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Sharp LC-40LE550U no Backlights due to bad connector

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    #1

    Sharp LC-40LE550U no Backlights due to bad connector

    I fixed this 2/6/2016, the connector for the LED strip PCB just came off the solder pads.
    Attached Files
    Never stop learning
    Basic LCD TV and Monitor troubleshooting guides.
    http://www.badcaps.net/forum/showthr...956#post305956

    Voltage Regulator (LDO) testing:
    http://www.badcaps.net/forum/showthr...999#post300999

    Inverter testing using old CFL:
    http://www.badcaps.net/forum/showthr...er+testing+cfl

    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
    http://s807.photobucket.com/user/budm/library/

    TV Factory reset codes listing:
    http://www.badcaps.net/forum/showthread.php?t=24809
    Tags: None
    #2
    Re: Sharp LC-40LE550U no Backlights due to bad connector

    Now this is some real s**t for a TV set to be this new and you have to be fix already ---> really
    Do they make any thing good any more
    Did they at least use a good brand of caps in this TV set
    Last edited by sam_sam_sam; 09-20-2016, 03:55 PM.
    9 PC LCD Monitor
    6 LCD Flat Screen TV
    30 Desk Top Switching Power Supply
    10 Battery Charger Switching Power Supply for Power Tool
    6 18v Lithium Battery Power Boards for Tool Battery Packs
    1 XBox 360 Switching Power Supply and M Board
    25 Servo Drives 220/460 3 Phase
    6 De-soldering Station Switching Power Supply 1 Power Supply
    1 Dell Mother Board
    15 Computer Power Supply
    1 HP Printer Supply & Control Board * lighting finished it *


    These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

    1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
    2 Hem Saw Computer Stack Board

    All of these had CAPs POOF
    All of the mosfet that are taken out by bad caps

    Comment

      #3
      Re: Sharp LC-40LE550U no Backlights due to bad connector

      I fixed it in 2/2016 but I do not know what year it is built.
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

      Comment

        #4
        Re: Sharp LC-40LE550U no Backlights due to bad connector

        How did you open the LCD ? I've try to get to those parts and it's very difficult. Do you have a Guide?

        Comment

          #5
          Re: Sharp LC-40LE550U no Backlights due to bad connector

          Originally posted by Eugenio1991 View Post
          How did you open the LCD ? I've try to get to those parts and it's very difficult. Do you have a Guide?
          No specific instructs but they are all very similar and do not mix up the order of the diffuser sheets.
          Here are many videos on the subject.

          https://www.youtube.com/results?sear...ed+strip+in+tv

          Comment

            #6
            Re: Sharp LC-40LE550U no Backlights due to bad connector

            Thank you Doc38343.
            I was able to take it apart but none of the led's turn on.
            How could I test the power supply for this tv?
            When I plug it in a get the green light indicator but no pic or sound and no back lights .
            Any help will greatly be apriciated.

            Comment

              #7
              Re: Sharp LC-40LE550U no Backlights due to bad connector

              you might be best off starting a new thread on your tv.

              you will need pics of the rear, without the back cover on and pics of each board and it will start things off quickly if you can also list the voltages on the wiring connector that runs to the main board.

              list it as
              pin no, pin desc, v in stby, v when powered on.





              we can then start guiding you where to look and what to test.
              WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?

              Comment

                #8
                Re: Sharp LC-40LE550U no Backlights due to bad connector

                Will do.
                Thank you

                Comment

                  #9
                  Re: Sharp LC-40LE550U no Backlights due to bad connector

                  I came across one of these too. Had the image on the screen if the flashlight was shining on it. I opened up the panel as you suggested, and two of those connectors linking the LED strips fell off in my hand.
                  Resoldered them, got it back together, and it lights up!

                  See, I do search here before posting a question. :-)

                  Thanks again.
                  Paul

                  Comment

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